BOSTON – Jurors in Boston deliberated for a fourth day without reaching a verdict in the parental kidnapping trial of the man who calls himself Clark Rockefeller.

The jurors got the case Monday and will resume deliberations Friday.

They had asked a judge Wednesday if prosecutors had to prove that Rockefeller — whose real name is Christian Karl Gerhartsreiter — knew what he was doing was criminal or morally wrong. The judge told the panel the prosecution must prove both.